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Патент USA US2123736

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July 12, l938.'
.
A. KLEIN
2,123,736
PIANO ACTION
Filed June 29, 1937
WITNESSES
INVENTOR
?dqzf Klein
ATI'ORNEYS
Patented July 12, 1938
2,123,736
UNITED STATES PATENT OFFICE
2,123,736
PIANO ACTION
Adolf Klein, New York, N. Y.
Application June 29, 1937, Serial No. 150,943
2 Claims. (01. 84—240)
This invention relates to musical instruments, the abstract 3 is preferably metal. The member
and has particular reference to actions of pianos.
An object of the invention is to provide an im
proved means whereby the hammer may be held
in check at the desired distance or position from
the string.
Another object of the invention is to provide an
improved means for holding the hammer in check
together with mechanism for adjusting said
10 means.
An additional and more speci?c object of the
invention is to provide an improved form of ab
stract for connecting the wippen of the action
15
with the key.
In the accompanying drawing:
Fig. 1 is a side elevation showing the action in
normal idle position, part of the stationary por
tion of the piano being shown in connection with
the key;
20
Fig. 2 is a side View of the abstract shown in
Fig. 1 together with a sectional view of an ad
justable capstan associated therewith.
Referring to the accompanying drawing by
numerals, I indicates a stationary part of the
piano which carries the key 2, which key and
immediate associated parts are old and well
known. An abstract 3 has one end operatively
connected with the Wippen 4. The action in
cludes a hammer 5 connected with the butt 6
which is pivotally mounted at l on a stationary
?ange 8. The Wippen 4 is pivotally mounted on
the second stationary ?ange 9 and has a rigid
extension H! on which the jack H is pivotally
mounted. Jack H acts on butt 6 in the usual
35 way for causing the hammer 5 to function.
Wippen 4 is provided with an aperture l2 having
a lining [3 of felt or other suitable material
through which the journal section 14 of the ab
stract 3 extends.
A turned down portion l5 ex
tends substantially parallel With the side of the
Wippen 4, while the journal section M extends
directly through the Wippen and unites integrally
with an offset portion l6 which is bent at ll to
form the downwardly extending leg l8 which
merges into the loop l9 that in turn merges into
the abstract body 20. The abstract 3 may be
termed a pull abstract because the body part 20
is pulled upwardly each time key 2 is caused to
function.
At the upper end the body 20 merges into loop
2| that has a downwardly extending .leg 22
formed with or supplied with an enlargement 23
which may be integral or may be separate and
secured to the lower end of leg 22. For instance,
55 the rounded enlargement 23 may be wood, While
23 ?ts into a socket 24 in the capstan 25 and rests
on a cushion 26 which may be felt or other
suitable material. The lower end of the capstan
25 is provided with a threaded bore 21 into which
the threaded end of pin 28 is ?tted. The op
posite end of the pin 28 is forced into a suitable
bore in the key 2. By providing the threaded
end of pin 28 the capstan 25 will be raised or
lowered and consequently Wippen 4 may be ad
justed upwardly and downwardly to cause a
proper action of the hammer 5. Suitable tie
members of metal or other material 29 and 35
are provided adjacent the upper and lower ends
of the abstract 3 to hold the respective legs l8
and 22 in proper position.
After the parts have been arranged substan
tially as shown in Fig. l, the capstan 25 is rotated
in either direction as may be desired to cause a
proper action of the hammer 5. If the hammer
5 should be spaced a short distance away from the
pad 3|, capstan 25 would be rotated to lower the
abstract 3 sufficiently to permit the hammer 5 to
rest against the pad while the upper end of jack
H was rather lightly contacting the pad 32 car
ried by the butt 6. After this check or adjust
ment has been secured the parts are in correct
operative position so that when the outer end of
key 2 is struck by an operator the hammer 5 and
associated parts of the action will function as de
sired. Each time that the key is struck at the
outer end the abstract 3 will give an upward pull
on one end of the Wippen 4 so as to cause the jack
H to properly function. As soon as the key is
released the parts will quickly assume the posi
tion shown in Fig. 1 ready for a second action.
By this construction and arrangement of abstract
and associated parts the action may be arranged
as shown in Fig. 1 or if desired could be lowered
until the hammer 5 was below the key. It will
therefore be seen that by this construction the
action may be placed at a comparatively high
point or low point in respect to the key 2 and at
the same time function in the usual manner.
I claim:
1. In a piano action of the character described,
an abstract having an upper end bent to present
a downwardly extending leg, an egg-shaped en
largement on the lower end of said leg, a capstan
having a socket in which said enlargement is
loosely mounted, a cushion positioned in said
socket beneath said enlargement, and a threaded
member for connecting the capstan with a key
of the piano, said threaded member coacting with
2
1
-
2,123,736
the capstan for vertically adjusting the position
of said abstract, said abstract at the lower end
being bent to present a generally hook-shaped
portion formed with a journal section adapted to
extend through the wippen of the action.
2. In a piano action of the character described,
an abstract having its upper end bent to present
a downwardly extending leg, a capstan having a
socket in which the lower end of said leg is loosely
mounted, a cushion positioned in said socket be
neath the lower end of said leg, a threaded mem
ber for connecting the capstan with a key of the
piano, said threaded member coacting with said
capstan for vertically adjusting the position of
the abstract and means at the lower end of the
abstract for pivotally connecting the abstract to
the wippen of the action.
ADOLF KLEIN.
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